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POAndroid - class is not a view android.support.v4.fragment
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copied!<p>I have to use fragment, with v4 support, but I've got an error crashing the App. I can't find the solution!</p> <p>This is my code :</p> <p><strong>activity_advert_list.xml :</strong></p> <pre><code><?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" > <android.support.v4.app.Fragment android:id="@+id/advertListFragment" android:layout_width="match_parent" android:layout_height="match_parent" android:name="com.myapp.fragment.AdvertListFragment"/> </code></pre> <p> </p> <p><strong>AdvertListActivity.java</strong></p> <pre><code>package com.myapp.app; import java.util.ArrayList; import com.myapp.R; import com.myapp.classmodel.Advert; import com.myapp.fragment.AdvertDetailFragment; import com.myapp.interf.OnAdvertSelectedListener; import com.google.analytics.tracking.android.EasyTracker; import android.os.Bundle; import android.support.v4.app.FragmentActivity; public class AdvertListActivity extends FragmentActivity implements OnAdvertSelectedListener { private AdvertListActivity activity = this; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_advert_list); } @Override public void onStart() { super.onStart(); // Google Analytics EasyTracker.getInstance().activityStart(this); } @Override public void onStop() { super.onStop(); // Google Analytics EasyTracker.getInstance().activityStop(this); } /** * Called by fragment * Used to pass advertList & current position to detail fragment */ @Override public void onAdvertItemSelected(ArrayList<Advert> advertList, int currentPosition) { AdvertDetailFragment fragment = (AdvertDetailFragment) activity.getSupportFragmentManager().findFragmentById(R.id.advertDetailFragment); if (fragment != null && fragment.isInLayout()) { fragment.setData(advertList, currentPosition); } } } </code></pre> <p><strong>EDIT</strong></p> <p><strong>Logcat with android.support.v4.app.Fragment :</strong></p> <pre><code>04-22 11:09:48.223: E/AndroidRuntime(30349): FATAL EXCEPTION: main 04-22 11:09:48.223: E/AndroidRuntime(30349): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myapp/com.myapp.app.AdvertListActivity}: android.view.InflateException: Binary XML file line #7: Class is not a View android.support.v4.app.Fragment 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.app.ActivityThread.access$600(ActivityThread.java:141) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.os.Handler.dispatchMessage(Handler.java:99) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.os.Looper.loop(Looper.java:137) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.app.ActivityThread.main(ActivityThread.java:5041) 04-22 11:09:48.223: E/AndroidRuntime(30349): at java.lang.reflect.Method.invokeNative(Native Method) 04-22 11:09:48.223: E/AndroidRuntime(30349): at java.lang.reflect.Method.invoke(Method.java:511) 04-22 11:09:48.223: E/AndroidRuntime(30349): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 04-22 11:09:48.223: E/AndroidRuntime(30349): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 04-22 11:09:48.223: E/AndroidRuntime(30349): at dalvik.system.NativeStart.main(Native Method) 04-22 11:09:48.223: E/AndroidRuntime(30349): Caused by: android.view.InflateException: Binary XML file line #7: Class is not a View android.support.v4.app.Fragment 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.view.LayoutInflater.createView(LayoutInflater.java:604) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.view.LayoutInflater.rInflate(LayoutInflater.java:746) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.view.LayoutInflater.inflate(LayoutInflater.java:489) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 04-22 11:09:48.223: E/AndroidRuntime(30349): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.app.Activity.setContentView(Activity.java:1881) 04-22 11:09:48.223: E/AndroidRuntime(30349): at com.myapp.app.AdvertListActivity.onCreate(AdvertListActivity.java:19) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.app.Activity.performCreate(Activity.java:5104) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 04-22 11:09:48.223: E/AndroidRuntime(30349): ... 11 more 04-22 11:09:48.223: E/AndroidRuntime(30349): Caused by: java.lang.ClassCastException: android.support.v4.app.Fragment cannot be cast to android.view.View 04-22 11:09:48.223: E/AndroidRuntime(30349): at java.lang.Class.asSubclass(Class.java:1380) 04-22 11:09:48.223: E/AndroidRuntime(30349): at android.view.LayoutInflater.createView(LayoutInflater.java:552) 04-22 11:09:48.223: E/AndroidRuntime(30349): ... 22 more </code></pre> <p><strong>Logcat with fragment</strong></p> <pre><code>04-22 11:07:39.950: E/AndroidRuntime(30107): FATAL EXCEPTION: main 04-22 11:07:39.950: E/AndroidRuntime(30107): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myapp/com.myapp.app.AdvertListActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class fragment 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.app.ActivityThread.access$600(ActivityThread.java:141) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.os.Handler.dispatchMessage(Handler.java:99) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.os.Looper.loop(Looper.java:137) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.app.ActivityThread.main(ActivityThread.java:5041) 04-22 11:07:39.950: E/AndroidRuntime(30107): at java.lang.reflect.Method.invokeNative(Native Method) 04-22 11:07:39.950: E/AndroidRuntime(30107): at java.lang.reflect.Method.invoke(Method.java:511) 04-22 11:07:39.950: E/AndroidRuntime(30107): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 04-22 11:07:39.950: E/AndroidRuntime(30107): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 04-22 11:07:39.950: E/AndroidRuntime(30107): at dalvik.system.NativeStart.main(Native Method) 04-22 11:07:39.950: E/AndroidRuntime(30107): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class fragment 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.view.LayoutInflater.rInflate(LayoutInflater.java:746) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.view.LayoutInflater.inflate(LayoutInflater.java:489) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 04-22 11:07:39.950: E/AndroidRuntime(30107): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.app.Activity.setContentView(Activity.java:1881) 04-22 11:07:39.950: E/AndroidRuntime(30107): at com.myapp.app.AdvertListActivity.onCreate(AdvertListActivity.java:19) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.app.Activity.performCreate(Activity.java:5104) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 04-22 11:07:39.950: E/AndroidRuntime(30107): ... 11 more 04-22 11:07:39.950: E/AndroidRuntime(30107): Caused by: java.lang.NullPointerException 04-22 11:07:39.950: E/AndroidRuntime(30107): at com.myapp.fragment.AdvertListFragment.onCreateView(AdvertListFragment.java:63) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:846) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1061) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1160) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:272) 04-22 11:07:39.950: E/AndroidRuntime(30107): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676) 04-22 11:07:39.950: E/AndroidRuntime(30107): ... 21 more </code></pre>

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